1. Department of Travel Medicine, National Public Health Organization, Athens, Greece
2. Department of Respiratory Diseases, Directorate of Epidemiological Surveillance and Interventions for Infectious Diseases, National Public Health Organization, Athens, Greece
3. Department of Vectorborne Diseases, Directorate of Epidemiological Surveillance and Interventions for Infectious Diseases, National Public Health Organization, Athens, Greece
4. Department of Internal Medicine, University of Patras Medical School, Patras, Greece
5. Directorate of Epidemiological Surveillance and Interventions for Infectious Diseases, National Public Health Organization, Athens, Greece